501430665 has 16 divisors (see below), whose sum is σ = 808416576. Its totient is φ = 265387200.

The previous prime is 501430621. The next prime is 501430669. The reversal of 501430665 is 566034105.

It is not a de Polignac number, because 501430665 - 2⁸ = 501430409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (501430669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125626 + ... + 129555.

It is an arithmetic number, because the mean of its divisors is an integer number (50526036).

Almost surely, 2^501430665 is an apocalyptic number.

It is an amenable number.

501430665 is a deficient number, since it is larger than the sum of its proper divisors (306985911).

501430665 is a wasteful number, since it uses less digits than its factorization.

501430665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255320.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 501430665 is about 22392.6475656632. The cubic root of 501430665 is about 794.4568181503.

The spelling of 501430665 in words is "five hundred one million, four hundred thirty thousand, six hundred sixty-five".